From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f198.google.com (mail-pf0-f198.google.com [209.85.192.198]) by kanga.kvack.org (Postfix) with ESMTP id 231D56B0025 for ; Wed, 18 Apr 2018 14:49:28 -0400 (EDT) Received: by mail-pf0-f198.google.com with SMTP id q22so1392688pfh.20 for ; Wed, 18 Apr 2018 11:49:28 -0700 (PDT) Received: from bombadil.infradead.org (bombadil.infradead.org. [2607:7c80:54:e::133]) by mx.google.com with ESMTPS id n2si1538471pga.202.2018.04.18.11.49.23 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 18 Apr 2018 11:49:23 -0700 (PDT) From: Matthew Wilcox Subject: [PATCH v3 09/14] mm: Use page->deferred_list Date: Wed, 18 Apr 2018 11:49:07 -0700 Message-Id: <20180418184912.2851-10-willy@infradead.org> In-Reply-To: <20180418184912.2851-1-willy@infradead.org> References: <20180418184912.2851-1-willy@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Matthew Wilcox , Andrew Morton , "Kirill A . Shutemov" , Christoph Lameter , Lai Jiangshan , Pekka Enberg , Vlastimil Babka From: Matthew Wilcox Now that we can represent the location of 'deferred_list' in C instead of comments, make use of that ability. Signed-off-by: Matthew Wilcox --- mm/huge_memory.c | 7 ++----- mm/page_alloc.c | 2 +- 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 14ed6ee5e02f..55ad852fbf17 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -483,11 +483,8 @@ pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma) static inline struct list_head *page_deferred_list(struct page *page) { - /* - * ->lru in the tail pages is occupied by compound_head. - * Let's use ->mapping + ->index in the second tail page as list_head. - */ - return (struct list_head *)&page[2].mapping; + /* ->lru in the tail pages is occupied by compound_head. */ + return &page[2].deferred_list; } void prep_transhuge_page(struct page *page) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 88e817d7ccef..18720eccbce1 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -953,7 +953,7 @@ static int free_tail_pages_check(struct page *head_page, struct page *page) case 2: /* * the second tail page: ->mapping is - * page_deferred_list().next -- ignore value. + * deferred_list.next -- ignore value. */ break; default: -- 2.17.0